Double-walled drinking glass



FIG. 1 is a top perspective view of a double-walled drinking glass, showing my new design;

FIG. 2 is a side view of the double-walled drinking glass;

FIG. 3 is a top-down view of the double-walled drinking glass; and,

FIG. 4 is a bottom view of the double-walled drinking glass.

Any broken lines in the figures illustrate the portions of the invention that form no part of the claimed design. 

CLAIM The ornamental design for a double-walled drinking glass, as shown and described. 